Creative problem solving refers to the ability to solve problems that are different from those the leamer has previously learned. Creative problem solving reflects the "true understanding" of the event or information. He suggested that true understanding is at a level higher than the recall of information and that the understanding means that, in addition to knowing the basic descriptive and explanative information presented, a leamer must be able to put this information together in a new way and apply it to a new context. We label this ability as inference ability.